APC 0M-PMMCB4021 L-Frame Circuit Breaker, 400A, 240V

Deliver uninterrupted power to critical infrastructure with the APC by Schneider Electric 0M-PMMCB4021 L-Frame circuit breaker. Engineered for high-current applications, this 400A, 240V circuit breaker provides dependable overcurrent protection to reduce downtime and protect sensitive equipment in data centers, security control rooms, surveillance installations and network closets. Its robust L-frame construction and stable trip characteristics help ensure predictable performance under heavy loads and frequent switching, simplifying capacity planning for IT and low-voltage teams.

Designed for straightforward integration into power distribution systems, the APC L-Frame breaker streamlines maintenance and supports coordinated protection strategies across power panels and PDUs. By minimizing nuisance trips and isolating faults quickly, it helps protect cameras, NVRs, access control panels and monitoring hardware from damage while maintaining uptime for critical security and monitoring operations. Backed by APC by Schneider Electric’s reputation for reliability, model 0M-PMMCB4021 is an ideal choice for facilities that demand secure, high-current protection. Contact your APC distributor or add this breaker to your BOM to ensure resilient power protection for your next security, surveillance or networking deployment.

• Delivers reliable 400A, 240V overcurrent protection to reduce downtime for security, surveillance and IT systems
• L-frame design built for high-current loads, offering predictable trip behavior and long-term durability
• Simplifies power distribution and maintenance — easy integration with PDUs and power panels
• Rapid fault isolation protects cameras, NVRs, access control and monitoring hardware
• Trusted APC by Schneider Electric quality (model 0M-PMMCB4021) for enterprise deployments